Your Steam download starts, then the speed collapses to 0 bytes per second and just sits there. It is one of the most common Steam annoyances, and it usually comes down to the content server, your cache, or something throttling the connection rather than a broken internet link. Here is a fast, ordered way to get it moving again.
Change the download region and clear the cache
Pick a different download region
Steam assigns you a content server, and a busy or misbehaving one can drop to zero. In Settings, open Downloads, and change Download Region to a nearby but different city. Restart Steam and the download often resumes at full speed.
Clear the download cache
A corrupted download cache stalls transfers. In Settings, Downloads, choose Clear Download Cache. Steam restarts and rebuilds it. This resolves a large share of 0-byte stalls with no risk to installed games.
Remove the throttles and blockers
Check bandwidth and background apps
Make sure no per-app bandwidth limit is set in Steam. Then close other heavy network users: cloud backups, big browser downloads, or another PC updating games. A single saturated 50 to 100 Mbps line divided among several tasks can look like a Steam stall.
Let Steam through your firewall and antivirus
Security software occasionally blocks Steam mid-download, which shows as 0 bytes. Confirm Steam is allowed through Windows Firewall and your antivirus, and temporarily pause aggressive web-protection to test.
| Cause | Sign | Fix |
|---|---|---|
| Bad content server | Zero after a good start | Change download region |
| Corrupt cache | Stalls on many games | Clear download cache |
| Bandwidth contention | Slow only when others use net | Pause other downloads |
| Firewall/AV block | Zero after a Windows update | Allow Steam, pause AV to test |
Network-level fixes when nothing else works
Flush your DNS and try a reliable public DNS server if resolution to Steam’s servers is flaky. A quick router restart clears a stuck connection table. If you are on Wi-Fi and it keeps dropping to zero, a wired connection is far more consistent for large multi-gigabyte downloads. Finally, disk trouble can stall a download at 0 bytes because Steam cannot write, so make sure the target drive has free space and is healthy.
Repair the library folder and disk
Sometimes the stall is not the network at all but the destination. If Steam cannot write to the install folder, the download parks at 0 bytes while it retries. In Steam’s Storage settings you can verify the library folder and let it repair permissions or errors. Confirm the target drive has several gigabytes free and is not showing errors, because a failing disk or a full drive stops writes cold. Moving the download to a healthy SSD not only fixes stubborn 0-byte stalls but also speeds the unpack stage that follows the download, so the whole install finishes far faster.
FAQ
Why does the download hit full speed then drop to zero repeatedly?
That sawtooth pattern points to a struggling content server or background apps grabbing bandwidth in bursts. Change region and pause other network activity to smooth it out.
Does clearing the download cache delete my installed games?
No. It only clears temporary download data and signs you back in. Your installed games and saves are untouched.
Bottom line
A Steam download stuck at 0 bytes is usually the content server or a local throttle, not your whole connection. Change your download region, clear the cache, remove bandwidth and firewall blockers, and prefer a wired link for big installs.
